First thing first, did you learn commutative and noncommutative operations in mathematics ?
Assuming you do, are you assuming commutative property here? Why do you assume that?
Occurrence of event A should have the occurrence of event B doesn’t mean occurrence of event B will lead to occurrence of event A.
To use RSI effectively, there are many tricks of the trade See quote below… comment on Puru’s testing. RSI is extremely reliable yet many people don’t know how to use it effectively
Trick of the trade
You are assuming they know how to use them effectively
That’s not true. Because many people don’t understand TA or don’t know how to use them effectively. Many traders are still using moving averages, basic support/ resistance/ trend lines, RSI and MACD.